Demos (with Java sources)

Heap sort visualization
A short primer on the heap sort algorithm + a user's
guide to learn the applet's interface and how it works.
Finally, check out the visualization applet itself to
dissect this truly elegent sorting algorithm. Technical
documentation is also available for anyone wanting to see
how this applet was designed and implemented in the Java
language. From there, the source code is explained.

Postman's
Sort - Postman's Sort is a fast file sorting utility
for all Intel platforms. Records can be fixed, variable,
or text. One package includes versions for DOS, Windows,
Windows NT, and OS/2; DLLs for all versions of Windows,
TSR for DOS.

Efficient sorting
algorithm for strings - They
have implemented a sorting algorithm that sorts an array
of strings with time and space complexity O(n). Remember
that most objects can be represented as strings so the
algorithm will do fine in most applications. The
algorithm shows its' efficiency when there are a large
number of strings to be sorted.